Name: Boom Lift Hydraulic Cylinder Set | 8 Models | Bore Φ40–110mm - Korea Boom Lift Hydraulic Cylinder Set | 8 Models | Bore Φ40–110mm Manufacturers, Suppliers - hydraulic cylinders price
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Aerial Work Vehicle Hydraulic Cylinder

Boom Lift Hydraulic Cylinder Set
8 Models · Bore Φ40–110mm · 10–25 MPa · 7–137 kg

Every hydraulic cylinder on a self-propelled boom lift — from the 7 kg steering cylinder to the 137 kg folding boom actuator. Eight models cover steering, platform leveling, main boom angle, folding boom angle, boom extension, and lifting functions. A complete single-source cylinder set for boom lift manufacturers, rebuild shops, and rental fleet operators.

8 ModelsComplete Set

Φ40–110mmBore Range

60–1,458mmStroke Range

10–25 MPaWorking Pressure

7–137 kgWeight Range

All 8 Cylinder Models — Full Specifications

Model	Function	Bore	Rod	Stroke	Inst.Dist.	Pressure	Max	Weight
EP-HCYY11112005	Main Boom Angle	Φ55	Φ50	506	1,259.7	21	26.5	32 kg
EP-HCYY11112006	Lifting	Φ65	Φ45	1,260	1,629	18	27	54 kg
EP-HCYY11112007	Steering (double-rod)	Φ40	Φ25	100×2	645	10	15	7 kg
EP-HCYY11112008	Upper Leveling	Φ63	Φ45	60	375	25	30	16 kg
EP-HCYY11112009	Boom Extension	Φ110	Φ75	815	1,433	23	34	100 kg
EP-HCYY11112010	Main Boom Angle	Φ70	Φ40	555	923	20	30	28 kg
EP-HCYY11112011	Folding Boom Angle	Φ100	Φ80	1,458	1,899	21	32	137 kg
EP-HCYY11112012	Steering	Φ63	Φ35	320	540	21	32	13 kg

Pressure in MPa · Dimensions in mm

▲ Boom Lift Hydraulic Cylinder Set | 8 Models | Bore Φ40–110mm

Product Photos & Dimension Drawings

EP-HCYY11112005 Main Boom Angle	EP-HCYY11112006 Lifting
EP-HCYY11112007 Steering	EP-HCYY11112008 Leveling
EP-HCYY11112009 Extension	EP-HCYY11112010 Boom Angle
EP-HCYY11112011 Folding Boom	EP-HCYY11112012 Steering

What Each Cylinder Does on a Boom Lift

Boom lift with cylinder positions labeled

A self-propelled articulating boom lift is one of the most hydraulically complex aerial work platforms — with up to 8 separate cylinders performing different functions simultaneously. Unlike a scissor lift (one lifting cylinder, one steering cylinder), a boom lift requires coordinated multi-axis movement to position the platform in three-dimensional space:

Steering (EP-HCYY11112007 / 12) — drives the wheels for machine positioning. The EP-HCYY11112007 is a double-rod design (100×2 mm stroke) for the drive axle; the EP-HCYY11112012 (Φ63, 320 mm stroke) steers the non-drive axle for four-wheel steering capability.
Upper Leveling (EP-HCYY11112008) — the shortest-stroke cylinder in the set (only 60 mm). Keeps the work platform level as the boom angle changes. Operates at the highest pressure (25 MPa) because it must react quickly to maintain platform orientation.
Main Boom Angle (EP-HCYY11112005 / 10) — raises and lowers the main boom section. Two models for different boom configurations: the EP-HCYY11112005 (Φ55, 506 mm) for shorter booms and the EP-HCYY11112010 (Φ70, 555 mm) for longer-reach platforms.
Folding Boom Angle (EP-HCYY11112011) — the heaviest cylinder in the set at 137 kg. Controls the angle of the articulating (folding) boom section. Its 1,458 mm stroke provides the full range of motion needed for over-and-up reach to clear obstacles.
Boom Extension (EP-HCYY11112009) — telescopes the boom to extend the platform's horizontal reach. At Φ110 bore and 100 kg, this is the second-largest cylinder, operating at 23 MPa / 34 MPa max to handle the cantilever loads at full extension.
Lifting (EP-HCYY11112006) — a dedicated vertical lifting cylinder with 1,260 mm stroke, used for the initial platform elevation before the boom articulates. Operates at 18 MPa with a 54 kg weight.

Boom Lift vs Scissor Lift — Why More Cylinders?

Boom Lift: 8 Cylinders, 3D Reach

The boom extends outward and upward — reaching over obstacles, around building facades, and into positions that require horizontal reach. Each boom section needs its own angle and extension cylinder. The platform must stay level through all these movements, requiring a dedicated leveling cylinder.

Scissor Lift: 2 Cylinders, Vertical Only

The scissor mechanism moves straight up. One lifting cylinder unfolds the scissors; one steering cylinder drives the machine. No boom articulation, no extension, no leveling. The platform stays level by design. Simpler, but limited to vertical-only access.

Key Advantages

Complete 8-cylinder set from one supplier — steering, leveling, boom angle, boom extension, and lifting cylinders all sourced from Korea Ever-Power. Eliminates multi-supplier coordination for boom lift builds and rebuilds.
Pressure ratings matched to function — each cylinder is rated for its specific load profile. The leveling cylinder operates at 25/30 MPa for rapid response; the steering at 10/15 MPa for smooth control; the extension at 23/34 MPa for heavy cantilever loads.
Holding valves on all critical cylinders — boom angle, extension, and lifting cylinders include pilot-operated check valves that lock the boom at any position under hydraulic failure. Workers at height depend on these valves.
⚡ Weight range 7–137 kg — from the compact 7 kg double-rod steering cylinder to the 137 kg folding boom actuator. Every cylinder is optimised for its specific position — no over-engineering, no unnecessary weight on the boom structure.
Outdoor-rated sealing and corrosion protection — boom lifts operate on construction sites, in weather, and in dusty environments. All cylinders are supplied with hard-chrome rods (Ra ≤0.2 µm) and weather-rated seals.

Complete Aerial Work Vehicle Cylinder Family

Korea Ever-Power manufactures hydraulic cylinders for both scissor lift and boom lift aerial work platforms:

EP-HCYY11112003

Scissor Lift Lifting Cylinder. 3 specs, Φ63–75 mm.

EP-HCYY11112004

Scissor Lift Steering Cylinder. 2 specs, Φ40 mm, 2.8 kg.

Boom Lift Cylinders ← this product

8 models: steering, leveling, boom angle, extension. Φ40–110 mm.

Why Choose Korea Ever-Power

Korea Ever-Power is a professional hydraulic cylinder manufacturer and supplier, specialising in forklift hydraulic cylinders, aerial work vehicle cylinders, mobile machinery cylinders, offshore cylinders, and industrial engineering cylinders. Our production facilities are equipped with composite machining centres, multi-station welding robots, automated assembly lines, specialised cylinder testing machines, and a dedicated quality inspection area — ensuring every cylinder meets OEM-grade performance standards.

Korea Ever-Power hydraulic cylinder manufacturing facility

Korea Ever-Power forklift tilt cylinders are manufactured to the same specifications and quality standards as original equipment cylinders fitted to major forklift brands worldwide. Every cylinder is 100% hydrostatic pressure tested, dimensionally inspected, and shipped with a test certificate and seal kit. Contact the Korea Ever-Power team for pricing and lead time.

Frequently Asked Questions

Can I order individual cylinders or only the complete set?

Both — individual cylinder models are available for single-cylinder replacement, or the complete 8-cylinder set can be ordered for a full boom lift rebuild. Contact Korea Ever-Power with your boom lift model and the specific cylinder position that needs replacement.

Why does the leveling cylinder (EP-HCYY11112008) have only 60 mm stroke?

The leveling cylinder makes small angular corrections to keep the platform horizontal as the boom angle changes. It does not move the boom — it adjusts the platform orientation. A 60 mm stroke is sufficient for the angular range needed, and the short stroke allows faster response at 25 MPa.

Why does the EP-HCYY11112005 have a 90.9% rod ratio (Φ50 rod in Φ55 bore)?

This is the highest rod ratio in the entire product range. The cylinder acts primarily as a tension member — pulling the boom into position rather than pushing. The thick rod provides the tensile strength needed, while the small annular area limits the oil flow for controlled, smooth boom movement.

Why is the folding boom cylinder (EP-HCYY11112011) so heavy at 137 kg?

At Φ100 bore, 1,458 mm stroke, and 21 MPa working pressure, this cylinder produces the highest force in the set. It must articulate the folding boom section — which carries the weight of the upper boom, the extension, the platform, and the workers — through a large angular range. The heavy-wall tube and thick rod are necessary for the structural loads.

What boom lift brands are compatible?

The cylinders are standard hydraulic components — compatible with any boom lift that uses the matching bore, stroke, and mounting dimensions. Confirm all dimensions with Korea Ever-Power before ordering, as cylinder specifications vary significantly between boom lift manufacturers and models.

Does Korea Ever-Power also supply scissor lift cylinders?

Yes — the EP-HCYY11112003 (scissor lift lifting cylinder) and EP-HCYY11112004 (scissor lift steering cylinder) are also available. Browse the complete aerial work vehicle hydraulic cylinder range.

What Our Customers Say

★★★★★Jun 2026

"Full cylinder rebuild on 4 articulating boom lifts. We ordered all 8 models as a complete set per machine. Every cylinder matched the original mounting dimensions. The boom movements are smooth and the platform leveling is precise — our operators noticed the improvement immediately."

R. Schneider — Rental Fleet Engineer, Germany

★★★★★Feb 2026

"We replaced just the folding boom cylinder (EP-HCYY11112011) — the original had developed a slow leak. At 137 kg it required a chain hoist for removal, but the new cylinder dropped straight in. No boom drift after 8 months of daily use."

T. Bergström — Service Technician, Sweden

★★★★☆Oct 2025

"Good quality at approximately 35% below OEM prices. We tested the boom extension cylinder (EP-HCYY11112009) on our hydraulic bench — pressure held at 34 MPa for 10 minutes with zero leakage. Chrome finish on the 100 kg cylinder is uniform across the full 815 mm rod length."

C. Oliveira — QC Manager, Brazil

★★★★★Jul 2025

"The leveling cylinder (EP-HCYY11112008) keeps the platform perfectly level through all boom movements. The 60 mm stroke responds quickly enough that our workers don't notice any platform tilt during boom articulation."

M. Dumont — Operations Manager, France

★★★★★Mar 2025

"We manage a mixed aerial fleet — scissor lifts and boom lifts. Korea Ever-Power supplies cylinders for both types, which simplifies our procurement. Consistent quality standards across the entire product range."

H. Virtanen — Fleet Director, Finland